期刊
MATERIALS
卷 13, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/ma13245647
关键词
halloysite-carbon nanocomposites; X-ray photoelectron spectroscopy; inverse gas chromatography; paracetamol; adsorption
类别
资金
- Ministry of Science and Higher Education [SMGR RN.20.271.665]
Analysis of surface properties of halloysite-carbon nanocomposites and non-modified halloysite was carried out with surface sensitive X-ray photoelectron spectroscopy (XPS) and inverse gas chromatography (IGC). The XPS spectra were measured in a wide range of the electron binding energy (survey spectra) and in the region of C 1s photoelectron peak (narrow scans). The IGC results show the changes of halloysite surface from basic for pure halloysite to acidic for carbon-halloysite nanocomposites. Halloysite-carbon nanocomposites were used as adsorbents of paracetamol from an aqueous solution. The adsorption mechanism was found to follow the pseudo-second-order and intra-particle diffusion models. The Langmuir multi-center adsorption model described well the obtained experimental data. The presence of carbon increased significantly the adsorption ability of halloysite-carbon nanocomposites for paracetamol in comparison to the non-modified halloysite.
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